A valve leakage detection device
A detection device and technology of leakage, applied in the measuring device, by detecting the appearance of fluid at the leakage point, measuring the capacity and other directions, it can solve the problems of quantitative testing of low temperature valve leakage, and achieve high practicability, accuracy and small error. , the effect of quickly measuring the data
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Embodiment 1
[0045] Such as figure 1 As shown, a valve leakage detection device includes a helium booster pump 11 and a leakage analyzer 2; the helium booster pump 11 is conductively connected to the flange at the inlet end of the measured valve 3 through a booster pipeline;
[0046] The leakage analyzer 2 includes a first thermostat 21, a first helium purity sensor 22, a second thermostat 23, a second helium purity sensor 24, an analysis calculation unit 25 and a flow meter 26; A helium purity sensor 22 is used to detect the pre-valve helium volume content in the mixed gas after the temperature and pressure control of the first constant temperature and pressure device 21; the second helium purity sensor 24 is used to detect The helium volume content behind the valve in the gas after the temperature and pressure control of the device 23; the flowmeter 26 is arranged at the outlet of the second helium purity sensor 24, and is used to detect the gas flow after the valve;
[0047] The analys...
Embodiment 2
[0049] On the basis of Embodiment 1, the pressurized pipeline is provided with a spiral pipe section 12; the spiral pipe section is provided with a supercooler 13 for cooling the gas in the pipe; the pressurized pipeline is also provided with a pressurization control valve 14; The pre-analysis pipeline and the post-analysis pipeline are respectively provided with a pre-analysis valve 27 and a post-analysis valve 28 .
[0050] The first constant temperature and pressure device 21 and the second constant temperature and pressure device 23 both include a pressure reducing valve, a heating element and a temperature controller; the calculation formula for the actual leakage of the measured valve 3 is preset in the analysis and calculation unit 25 1. The characteristic parameters of the helium gas loaded into the helium booster pump 11 and the characteristic parameters of the medium flowing through the measured valve 3 .
Embodiment 3
[0052] Such as figure 2 As shown, on the basis of Embodiment 1, the valve leakage detection device also includes a valve test pipeline assembly and a liquid storage tank 4 storing a cooling medium; the valve test pipeline assembly includes a valve for conducting the cooling medium The pre-valve pipeline and the post-valve pipeline; the liquid storage tank 4, the pre-valve pipeline, the measured valve 3, and the post-valve pipeline are sequentially connected to the liquid storage tank 4 to form a closed loop; The measuring valve 3 is provided with a temperature sensor; the pipeline in front of the valve is also provided with a cryopump 5 for cooling the cooling medium in the pipe; the inlet end of the cryopump 5 is provided with a gas-liquid separator 6 communicated with the liquid storage tank 4; The pre-valve pipeline and the post-valve pipeline are respectively provided with a front choke valve 71 and a rear choke valve 72 .
[0053] The connection position between the pre...
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